Games like Gym Simulator
Games like Gym Simulator include Goat Simulator, Totally Accurate Battle Simulator, PowerWash Simulator, Slime Rancher 2, and Placid Plastic Duck Simulator. We matched them by the tags players give Gym Simulator on Steam (Simulation, eSports, Choose Your Own Adventure, 3D, and Funny): closest matches first, and among equally close ones the better-known games.

Goat Simulator
Shared: Simulation · Funny · Open World

Totally Accurate Battle Simulator
Shared: Simulation · Funny · Physics

PowerWash Simulator
Shared: Simulation · Relaxing · 3D

Slime Rancher 2
Shared: Relaxing · Simulation · Open World

Placid Plastic Duck Simulator
Shared: Relaxing · 3D · Simulation

Garry's Mod
Shared: Funny · Physics · Simulation

Gas Station Simulator
Shared: Simulation · Singleplayer · Casual

Leaf it Alone
Shared: Simulation · Relaxing · Casual

DrainSim
Shared: Simulation · Relaxing · 3D

Passpartout: The Starving Artist
Shared: Simulation · Relaxing · Funny

Kerbal Space Program
Shared: Simulation · Physics · Indie

BeamNG.drive
Shared: Simulation · Physics · Open World

Low-Budget Repairs
Shared: Simulation · Funny · Relaxing

Librarian: Tidy Up the Arcane Library!
Shared: Relaxing · Simulation · 3D

Wobbly Life
Shared: Simulation · Open World · Funny

Mountain
Shared: Simulation · Relaxing · Indie

Fun with Ragdolls: The Game
Shared: Simulation · Funny · Physics

People Playground
Shared: Simulation · Physics · Funny

House Flipper
Shared: Simulation · Relaxing · Singleplayer

Cooking Simulator
Shared: Simulation · Funny · Physics

Stardew Valley
Shared: Simulation · Relaxing · Indie

Slime Rancher
Shared: Open World · Simulation · Funny

American Truck Simulator
Shared: Simulation · Open World · Relaxing

Gang Beasts
Shared: Funny · Physics · Simulation